about Injection
? 被說成是 black paper.....? 俺只是技術研究，沒其它目的.....
代碼優化
bool?EnablePrivilege(LPCTSTR?lpszPrivilege,?bool?bEnable)
{
????HANDLE?TokenHandle?=?NULL;
????//?
????if?(?FALSE?==?::OpenProcessToken(?GetCurrentProcess(),?TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,?&TokenHandle)?)
????{
????????return?false;
????}
????
????TOKEN_PRIVILEGES?tkp;
????
????//?Get?LUID?for?SeDebugPrivilege
????if(?FALSE?==?::LookupPrivilegeValue(NULL,?lpszPrivilege,?&tkp.Privileges[0].Luid)?)
????{
????????::CloseHandle(TokenHandle);
????????return?false;
????}
????tkp.PrivilegeCount?=?1;
#ifndef?SE_PRIVILEGE_REMOVED
#define?SE_PRIVILEGE_REMOVED?0X00000004?
#endif
????if(?bEnable?)
????????tkp.Privileges[0].Attributes?=?SE_PRIVILEGE_ENABLED;
????else
????????tkp.Privileges[0].Attributes?=?SE_PRIVILEGE_REMOVED;
????
????if?(?FALSE?==?AdjustTokenPrivileges(TokenHandle,?FALSE,?&tkp,?0,?NULL,?NULL)?)?
????{
????????::CloseHandle(TokenHandle);
????????return?false;
????}
????::CloseHandle(TokenHandle);
????return?true;
}
bool?RemoteLoadDLL(DWORD?dwProcessID,?const?char*?pszDLLPath)
{
????typedef?HMODULE?(WINAPI?*LoadLibraryPointor)(LPCTSTR);
????LoadLibraryPointor?pfnLoadLibrary?=?NULL;
????HMODULE?hKernel32?=?NULL;
????
????//Get?address?to?LoadLibrary?and?FreeLibrary
????if?(pfnLoadLibrary?==?NULL)?
????{
????????hKernel32?=?::GetModuleHandle("kernel32.dll");
????????
????????if?(?hKernel32?==?NULL?)
????????{
????????????return?false;????????????
????????}
????????
????????pfnLoadLibrary?=?(LoadLibraryPointor)GetProcAddress(hKernel32,?"LoadLibraryA");
????????
????????if?(pfnLoadLibrary?==?NULL)
????????{
????????????::FreeLibrary(hKernel32);
????????????return?false;
????????}
????}
????if(?!EnablePrivilege(SE_DEBUG_NAME,?true)?)
????????return?false;
????HANDLE?process?=?::OpenProcess(PROCESS_CREATE_THREAD|PROCESS_VM_OPERATION|PROCESS_VM_WRITE|PROCESS_VM_READ|PROCESS_QUERY_INFORMATION,?TRUE,?dwProcessID);
????if?(?process?==?NULL?)
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????return?false;
????}
????PVOID?memory?=?::VirtualAllocEx(process,?NULL,?strlen(pszDLLPath)+1,?MEM_COMMIT,?PAGE_READWRITE);
????
????if?(?memory?==?NULL?)
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????::CloseHandle(process);
????????return?false;
????}
????if?(?FALSE?==?::WriteProcessMemory(process,?memory,?(LPVOID)pszDLLPath,?strlen(pszDLLPath)+1,?NULL)?)
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????::VirtualFreeEx(process,?memory,?strlen(pszDLLPath)+1,?MEM_RELEASE);
????????::CloseHandle(process);
????????return?false;
????}
????//?Inject?Code
????DWORD?dwThreadID?=?0;
????HANDLE?hRemoteHandle?=?::CreateRemoteThread(process,?NULL,?0,?(LPTHREAD_START_ROUTINE)pfnLoadLibrary,?memory,?0,?&dwThreadID);
????if?(?hRemoteHandle?==?NULL?)?
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????::VirtualFreeEx(process,?memory,?strlen(pszDLLPath)+1,?MEM_RELEASE);
????????::CloseHandle(process);
????????return?false;
????}
????::WaitForSingleObject(hRemoteHandle,?INFINITE);
????DWORD?dwReturn?=?0;
????if(?FALSE?==?::GetExitCodeThread(hRemoteHandle,?&dwReturn)?)
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????::CloseHandle(hRemoteHandle);
????????::VirtualFreeEx(process,?memory,?strlen(pszDLLPath)+1,?MEM_RELEASE);
????????::CloseHandle(process);
????????return?false;
????}
????::EnablePrivilege(SE_DEBUG_NAME,?false);
????::CloseHandle(hRemoteHandle);
????::VirtualFreeEx(process,?memory,?strlen(pszDLLPath)+1,?MEM_RELEASE);
????::CloseHandle(process);
????::FreeLibrary(hKernel32);
????if(?dwReturn?==?NULL?)
????????return?false;
????else
????????return?true;????
}
HMODULE?GetProcessModule(DWORD?dwPID,?LPCTSTR?czDllName)?
{?
????HMODULE????????hMod???????=?NULL;
????BOOL??????????bFound??????=?FALSE;?
????HANDLE????????hModuleSnap?=?NULL;?
????MODULEENTRY32?me32????????=?{0};?
????//?Take?a?snapshot?of?all?modules?in?the?specified?process.?
????hModuleSnap?=?CreateToolhelp32Snapshot(TH32CS_SNAPMODULE,?dwPID);?
????if?(hModuleSnap?==?INVALID_HANDLE_VALUE)?
????????return?(FALSE);?
????//?Fill?the?size?of?the?structure?before?using?it.?
????me32.dwSize?=?sizeof(MODULEENTRY32);?
????//?Walk?the?module?list?of?the?process,?and?find?the?module?of?
????//?interest.?Then?copy?the?information?to?the?buffer?pointed?
????//?to?by?lpMe32?so?that?it?can?be?returned?to?the?caller.?
????if?(Module32First(hModuleSnap,?&me32))?
????{?
????????do?
????????{?
????????????if(0?==?lstrcmpi(czDllName,?me32.szExePath))
????????????{
????????????????hMod?=?me32.hModule;
????????????}
????????}?
????????while?(hMod?==?NULL?&&?Module32Next(hModuleSnap,?&me32));?
????}?
????else?
????{
????????hMod?=?NULL;???????????//?could?not?walk?module?list?
????}
????//?Do?not?forget?to?clean?up?the?snapshot?object.?
????CloseHandle(hModuleSnap);?
????return?hMod;?
}
bool?RemoteUnLoadDLL(DWORD?dwProcessID,?const?char*?pszDLLPath)
{
????typedef?BOOL?(WINAPI?*FreeLibraryFunType)(HMODULE?hModule);
????FreeLibraryFunType?pfnFreeLibrary?=?NULL;
????HMODULE?hKernel32?=?NULL;
????
????//Get?address?to?FreeLibrary
????if?(pfnFreeLibrary?==?NULL)?
????{
????????hKernel32?=?::GetModuleHandle("kernel32.dll");
????????
????????if?(?hKernel32?==?NULL?)
????????{
????????????return?false;????????????
????????}
????????
????????pfnFreeLibrary?=?(FreeLibraryFunType)GetProcAddress(hKernel32,?"FreeLibrary");
????????
????????if?(pfnFreeLibrary?==?NULL)
????????{
????????????::FreeLibrary(hKernel32);
????????????return?false;
????????}
????}
????if(?!EnablePrivilege(SE_DEBUG_NAME,?true)?)
????????return?false;
????HANDLE?process?=?::OpenProcess(PROCESS_CREATE_THREAD|PROCESS_VM_OPERATION|PROCESS_VM_WRITE|PROCESS_VM_READ|PROCESS_QUERY_INFORMATION,?TRUE,?dwProcessID);
????if?(?process?==?NULL?)
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????return?false;
????}
????HMODULE?hUnloadDll?=?GetProcessModule(dwProcessID,?pszDLLPath);
????if(?hUnloadDll?==?NULL?)
????????return?true;
????//?Inject?Code
????DWORD?dwThreadID?=?0;
????HANDLE?hRemoteHandle?=?::CreateRemoteThread(process,?NULL,?0,?(LPTHREAD_START_ROUTINE)pfnFreeLibrary,?(LPVOID)hUnloadDll,?0,?&dwThreadID);
????if?(?hRemoteHandle?==?NULL?)?
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????::CloseHandle(process);
????????return?false;
????}
????::WaitForSingleObject(hRemoteHandle,?INFINITE);
????DWORD?dwReturn?=?0;
????if(?FALSE?==?::GetExitCodeThread(hRemoteHandle,?&dwReturn)?)
????{
????????::EnablePrivilege(SE_DEBUG_NAME,?false);
????????::CloseHandle(hRemoteHandle);
????????::CloseHandle(process);
????????return?false;
????}
????::EnablePrivilege(SE_DEBUG_NAME,?false);
????::CloseHandle(hRemoteHandle);
????::CloseHandle(process);
????::FreeLibrary(hKernel32);
????if(?dwReturn?==?FALSE?)
????????return?false;
????else
????????return?true;
}
目前存在的已知問題：
1. 未考慮 64 位機器
2. 未考慮 DLL 加載失敗的處理 (2010.02.05-23:38 已經 Fixed)3. 提權后沒有恢復 (2010.02.07-17:15 已經Fixed)
4. 在?RemoteUnloadDLL 時，采用的是重定位DLL句柄的方法，有人跟我反應這種方法不安全，但我暫時還沒想到什么情況下會引發問題。目標程序的輸出結果是：
DLL_PROCESS_ATTACH C:\Documents and Settings\Administrator\桌面\demo\test\Debug\test.exe
DLL_THREAD_DETACH C:\Documents and Settings\Administrator\桌面\demo\test\Debug\test.exe
The thread 0x878 has exited with code 13500416 (0xCE0000).
DLL_THREAD_ATTACH C:\Documents and Settings\Administrator\桌面\demo\test\Debug\test.exe
DLL_PROCESS_DETACH C:\Documents and Settings\Administrator\桌面\demo\test\Debug\test.exe
The thread 0x624 has exited with code 1 (0x1).
（開始不明白，結果看了DLL_THREAD_DETACH 認識誤區后就明白了）又一天就這么過去了~